I. Application
Solar grade quartz tube is used as the base material for quartz components of diffusion and PE process in solar cell manufacturing.
II. Product Features
Solar grade quartz tube features high purity, low hydroxyl, etc.
III. Product Type
WQPQ181S, WQPQ181S-R
IV. Typical Size
| OD Range | OD Tolerance | WT Tolerance | Siding | Ovality | Bow |
| OD＜100.00 | ±1.00 | ±10.00% | 20.00% | 1.00% | 0.10% |
| 100.00≤OD＜200.00 | ±1.00 | ±10.00% | 20.00% | 1.00% | 0.10% |
| 200.00≤OD＜300.00 | ±1.00 | ±10.00% | 20.00% | 1.00% | 0.10% |
| 300.00≤OD＜400.00 | ±1.00 | ±10.00% | 20.00% | 1.00% | 0.10% |
| 400.00≤OD＜500.00 | ±1.00 | ±10.00% | 20.00% | 1.00% | 0.10% |
| 500.00≤OD＜900.00 | ±2.00 | ±10.00% | 20.00% | 1.00% | 0.10% |
V. Physical and Chemical Properties
i. Mechanical and Thermal Properties
| Item | Index Value |
| Density（g/cm3） | 2.2 |
| Heat Conductivity（w/m·k，1000℃） | 2.28 |
| Coefficient of Thermal Expansion（℃-1，1000℃） | 5.5×10-7 |
| Softening Point （℃） | 1670 |
| Annealing Point（℃） | 1210 |
| Strain Point（℃） | 1110 |
ii. OH Contents
| WQPQ181S | OH＜10ppm | WQPQ181S-R | OH＜30ppm |
iii. Trace Elements
| Code | Criteria | Al | Ca | Cr | Cu | Fe | K | Li | Mg | Mn | Na | Ti | Zr |
| PQ181S、PQ181S-R | Typical | 16.2 | 1 | <0.05 | <0.05 | 0.5 | 1.2 | 0.9 | 0.2 | <0.05 | 1.1 | 1.5 | 1 |
| Maximum | 25 | 1.5 | 0.1 | 0.1 | 1 | 1.5 | 1.5 | 0.2 | 0.2 | 2 | 4 | 2 |
iv. Optical Properties
